contrib/llvm/tools/lldb/source/Symbol/SymbolFile.cpp

   1 //===-- SymbolFile.cpp ------------------------------------------*- C++ -*-===//
   2 //
   3 //                     The LLVM Compiler Infrastructure
   4 //
   5 // This file is distributed under the University of Illinois Open Source
   6 // License. See LICENSE.TXT for details.
   7 //
   8 //===----------------------------------------------------------------------===//
   9
  10 #include "lldb/Symbol/SymbolFile.h"
  11
  12 #include "lldb/Core/Module.h"
  13 #include "lldb/Core/PluginManager.h"
  14 #include "lldb/Symbol/ObjectFile.h"
  15 #include "lldb/Symbol/TypeMap.h"
  16 #include "lldb/Symbol/TypeSystem.h"
  17 #include "lldb/Symbol/VariableList.h"
  18 #include "lldb/Utility/Log.h"
  19 #include "lldb/Utility/StreamString.h"
  20 #include "lldb/lldb-private.h"
  21
  22 using namespace lldb_private;
  23
  24 void SymbolFile::PreloadSymbols() {
  25   // No-op for most implementations.
  26 }
  27
  28 SymbolFile *SymbolFile::FindPlugin(ObjectFile *obj_file) {
  29   std::unique_ptr<SymbolFile> best_symfile_ap;
  30   if (obj_file != nullptr) {
  31
  32     // We need to test the abilities of this section list. So create what it
  33     // would
  34     // be with this new obj_file.
  35     lldb::ModuleSP module_sp(obj_file->GetModule());
  36     if (module_sp) {
  37       // Default to the main module section list.
  38       ObjectFile *module_obj_file = module_sp->GetObjectFile();
  39       if (module_obj_file != obj_file) {
  40         // Make sure the main object file's sections are created
  41         module_obj_file->GetSectionList();
  42         obj_file->CreateSections(*module_sp->GetUnifiedSectionList());
  43       }
  44     }
  45
  46     // TODO: Load any plug-ins in the appropriate plug-in search paths and
  47     // iterate over all of them to find the best one for the job.
  48
  49     uint32_t best_symfile_abilities = 0;
  50
  51     SymbolFileCreateInstance create_callback;
  52     for (uint32_t idx = 0;
  53          (create_callback = PluginManager::GetSymbolFileCreateCallbackAtIndex(
  54               idx)) != nullptr;
  55          ++idx) {
  56       std::unique_ptr<SymbolFile> curr_symfile_ap(create_callback(obj_file));
  57
  58       if (curr_symfile_ap.get()) {
  59         const uint32_t sym_file_abilities = curr_symfile_ap->GetAbilities();
  60         if (sym_file_abilities > best_symfile_abilities) {
  61           best_symfile_abilities = sym_file_abilities;
  62           best_symfile_ap.reset(curr_symfile_ap.release());
  63           // If any symbol file parser has all of the abilities, then
  64           // we should just stop looking.
  65           if ((kAllAbilities & sym_file_abilities) == kAllAbilities)
  66             break;
  67         }
  68       }
  69     }
  70     if (best_symfile_ap.get()) {
  71       // Let the winning symbol file parser initialize itself more
  72       // completely now that it has been chosen
  73       best_symfile_ap->InitializeObject();
  74     }
  75   }
  76   return best_symfile_ap.release();
  77 }
  78
  79 TypeList *SymbolFile::GetTypeList() {
  80   if (m_obj_file)
  81     return m_obj_file->GetModule()->GetTypeList();
  82   return nullptr;
  83 }
  84
  85 TypeSystem *SymbolFile::GetTypeSystemForLanguage(lldb::LanguageType language) {
  86   TypeSystem *type_system =
  87       m_obj_file->GetModule()->GetTypeSystemForLanguage(language);
  88   if (type_system)
  89     type_system->SetSymbolFile(this);
  90   return type_system;
  91 }
  92
  93 uint32_t SymbolFile::ResolveSymbolContext(const FileSpec &file_spec,
  94                                           uint32_t line, bool check_inlines,
  95                                           uint32_t resolve_scope,
  96                                           SymbolContextList &sc_list) {
  97   return 0;
  98 }
  99
 100 uint32_t SymbolFile::FindGlobalVariables(
 101     const ConstString &name, const CompilerDeclContext *parent_decl_ctx,
 102     bool append, uint32_t max_matches, VariableList &variables) {
 103   if (!append)
 104     variables.Clear();
 105   return 0;
 106 }
 107
 108 uint32_t SymbolFile::FindGlobalVariables(const RegularExpression &regex,
 109                                          bool append, uint32_t max_matches,
 110                                          VariableList &variables) {
 111   if (!append)
 112     variables.Clear();
 113   return 0;
 114 }
 115
 116 uint32_t SymbolFile::FindFunctions(const ConstString &name,
 117                                    const CompilerDeclContext *parent_decl_ctx,
 118                                    uint32_t name_type_mask,
 119                                    bool include_inlines, bool append,
 120                                    SymbolContextList &sc_list) {
 121   if (!append)
 122     sc_list.Clear();
 123   return 0;
 124 }
 125
 126 uint32_t SymbolFile::FindFunctions(const RegularExpression &regex,
 127                                    bool include_inlines, bool append,
 128                                    SymbolContextList &sc_list) {
 129   if (!append)
 130     sc_list.Clear();
 131   return 0;
 132 }
 133
 134 void SymbolFile::GetMangledNamesForFunction(
 135     const std::string &scope_qualified_name,
 136     std::vector<ConstString> &mangled_names) {
 137   return;
 138 }
 139
 140 uint32_t SymbolFile::FindTypes(
 141     const SymbolContext &sc, const ConstString &name,
 142     const CompilerDeclContext *parent_decl_ctx, bool append,
 143     uint32_t max_matches,
 144     llvm::DenseSet<lldb_private::SymbolFile *> &searched_symbol_files,
 145     TypeMap &types) {
 146   if (!append)
 147     types.Clear();
 148   return 0;
 149 }
 150
 151 size_t SymbolFile::FindTypes(const std::vector<CompilerContext> &context,
 152                              bool append, TypeMap &types) {
 153   if (!append)
 154     types.Clear();
 155   return 0;
 156 }